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Concrete composition
Improved process for producing carbon fibres (Japan Exlan Co Ltd, Japan)Br Pat 1 449 085 (25 January 19 78) Carbon fibres can be produced more efficiently in a short firing time and with improved adherence to resins. The wet spun pan fibres are treated with a polyamino siloxane in emulsion form, dried and heat treated conventionally to form carbon fibres.
High modulus oxybenzoyl copolyester fibres (The Carborundum Company, USA) Br Pat 1 499 513 (1 February 1978) Copolyesters from various aromatic carboxylic and hydroxy compounds can be melt spun and hot stretched to produce high strength and high modulus fibres.
Component in the form of a conical shell (Dornier System GmbH, Germany) Br Pat I 499 612(1 February 1978) The conical shell comprises individual layers of reinforcing staple fibres embedded in a plastics matrix: prepregs are layed-up in a manner so that the thermal expansion coefficient remains essentially zero. Expected application is for spacecraft components.
Process for manufacturing polymers containing S-triazine rings (Ciba-Geigy Co, Switzerland) Br Pat 1500 522 (8 February, 1978) These resins are suitable for preparing glass prepregs for producing laminates of high temperature resistance.
Improved process for producing C-fibres (Japan Exlan Co Ltd, Japan) Br Pat 1500 675 (8 February 1978) PAN fibres are stretched in hot acid (pH < 3.5) at temperatures greater than 80°C. Steam stretching at 140°C and conventional oxidation, carbonisation processes are used to produce carbon fibres claimed to have superior properties, in particular good separation between filaments. Method of manufacturing a contact body built up from thin layers of asbestos fibres (Aktiebolaget Carl Munters, Sweden) Br Pat 1502 372 (1 March 1978) Hydrated asbestos fibres are layed up, and on heating release water of crystallisation; they can be coated with water-glass to form a moulded material. Method of manufacturing a contact body built up from thin layers of asbestos fibres (Aktiebalaget Carl Munters, Sweden) Br Pat 1502 373 (1 March 1978} Hydrated asbestos fibres can be layed up similarly to BP 1502 372 together with silicon and aluminium. Sintering produces a material of composition SiOz/Al2Oa/MgO.
A traffic guardrail (Dansk Auto-Vaern A/S, Denmark)
Br Pat 1504 620 (22 March 19 78) 0.2 to 0.5% short polypropylene fibres in Portland cement concrete improves impact energy absorption; this has application especially for use as guardrails.
An apparatus for the manufacturing of objects of reinforced plastic (Nemo Polymerer AB, Sweden) Br Pat 1500 535 (8 February 1978) A divided mould which can be closed and evacuated is claimed which enables fast production of grp and also removes risks of contact with styrene monomer.
Laminate comprising a mineral fibre web laminate to a metal foil (Saint Gobain Industries, France) Br Pat 1505 159 (30 March 1978) A dispersion based on 5°95% silicic acid sol and 95-5% bentonite with solids content of 2-25% is used to impregnate and bond mineral fibres to aluminium foil.
Aqueous compositions of polyimides (Rhone-Poulenc Industries, France)
High durability reinforcing fibres for cement materials (Coming Glass, USA) Br Pat 1505 609 (30 March 19 78) Glass composition based on 85% basalt 15% zirconia has high resistance to cement products.
Br Pat 1500 605 (8 February 1978) Thixotropic aqueous suspensions of polyimide prepolymers can be used to coat glass fibres. The dried material can be laminated, moulded and cured.
212
US PA TENTS
Molded composite article and method for making the article Zion, E.M. (Owens-Coming Fiberglas Corporation) US Pat 4 025 686 (24 May 1977} A composite article comprising a layer of low density syntactic foam comprising a resinous material and a low density filler, a reinforcing layer of fibrous reinforcing material superimposed on the layer of syntactic foam and penetrating into it, and an outer skin of resinous material penetrating the reinforcing layer and the layer of syntactic foam.
Concrete composition Urschel, G.C.III and Judd, G.G. (Woodville Lime and Chemical Company) US Patent 4 026 716 (31 May 1977) A cementitious structural composition containing Portland cement, dolomitic limestone as a low-silica manufactured fine aggregate, water and from 5-15% of a precipitate comprising CaO-MgO.
Composite tubing DeLorean, J.Z. and Dirks, C.L. (John Z. DeLorean Corporation) US Pat 4 026 747(31 May 1977) An open-cell resilient foam strip, impregnated with a thermosetting resin is wrapped around a tubular core. A layer of reinforcing elements is then wrapped around the foam material in such a way that the resin is compressed into the foam cells and also encapsulates the reinforcing elements. The article is then heated to harden the resin.
Use of ground limestone as a filler in paper Bauman, H.D. (P.H. Glatfelter Co)
US Pat 4 026 762(31 May 1977)
Composite compositions from graft polymerized rigid fillers Bagley, E.B., et al (The United States of America - Secretary of Agriculture) US Pat 4 026 849 f31 May 1977) A method of preparing a filled plastics article by extruding a plastics composite The composite consists of a polymer matrix formed by grafting a thermoplastic polymer onto a rigid f'dler.
COMPOSITES. JULY 1978
High modulus oxybenzoyl copolyester fibres (The Carborundum Company, USA) Br Pat 1 499 513 (1 February 1978) Copolyesters from various aromatic carboxylic and hydroxy compounds can be melt spun and hot stretched to produce high strength and high modulus fibres.
Component in the form of a conical shell (Dornier System GmbH, Germany) Br Pat I 499 612(1 February 1978) The conical shell comprises individual layers of reinforcing staple fibres embedded in a plastics matrix: prepregs are layed-up in a manner so that the thermal expansion coefficient remains essentially zero. Expected application is for spacecraft components.
Process for manufacturing polymers containing S-triazine rings (Ciba-Geigy Co, Switzerland) Br Pat 1500 522 (8 February, 1978) These resins are suitable for preparing glass prepregs for producing laminates of high temperature resistance.
Improved process for producing C-fibres (Japan Exlan Co Ltd, Japan) Br Pat 1500 675 (8 February 1978) PAN fibres are stretched in hot acid (pH < 3.5) at temperatures greater than 80°C. Steam stretching at 140°C and conventional oxidation, carbonisation processes are used to produce carbon fibres claimed to have superior properties, in particular good separation between filaments. Method of manufacturing a contact body built up from thin layers of asbestos fibres (Aktiebolaget Carl Munters, Sweden) Br Pat 1502 372 (1 March 1978) Hydrated asbestos fibres are layed up, and on heating release water of crystallisation; they can be coated with water-glass to form a moulded material. Method of manufacturing a contact body built up from thin layers of asbestos fibres (Aktiebalaget Carl Munters, Sweden) Br Pat 1502 373 (1 March 1978} Hydrated asbestos fibres can be layed up similarly to BP 1502 372 together with silicon and aluminium. Sintering produces a material of composition SiOz/Al2Oa/MgO.
A traffic guardrail (Dansk Auto-Vaern A/S, Denmark)
Br Pat 1504 620 (22 March 19 78) 0.2 to 0.5% short polypropylene fibres in Portland cement concrete improves impact energy absorption; this has application especially for use as guardrails.
An apparatus for the manufacturing of objects of reinforced plastic (Nemo Polymerer AB, Sweden) Br Pat 1500 535 (8 February 1978) A divided mould which can be closed and evacuated is claimed which enables fast production of grp and also removes risks of contact with styrene monomer.
Laminate comprising a mineral fibre web laminate to a metal foil (Saint Gobain Industries, France) Br Pat 1505 159 (30 March 1978) A dispersion based on 5°95% silicic acid sol and 95-5% bentonite with solids content of 2-25% is used to impregnate and bond mineral fibres to aluminium foil.
Aqueous compositions of polyimides (Rhone-Poulenc Industries, France)
High durability reinforcing fibres for cement materials (Coming Glass, USA) Br Pat 1505 609 (30 March 19 78) Glass composition based on 85% basalt 15% zirconia has high resistance to cement products.
Br Pat 1500 605 (8 February 1978) Thixotropic aqueous suspensions of polyimide prepolymers can be used to coat glass fibres. The dried material can be laminated, moulded and cured.
212
US PA TENTS
Molded composite article and method for making the article Zion, E.M. (Owens-Coming Fiberglas Corporation) US Pat 4 025 686 (24 May 1977} A composite article comprising a layer of low density syntactic foam comprising a resinous material and a low density filler, a reinforcing layer of fibrous reinforcing material superimposed on the layer of syntactic foam and penetrating into it, and an outer skin of resinous material penetrating the reinforcing layer and the layer of syntactic foam.
Concrete composition Urschel, G.C.III and Judd, G.G. (Woodville Lime and Chemical Company) US Patent 4 026 716 (31 May 1977) A cementitious structural composition containing Portland cement, dolomitic limestone as a low-silica manufactured fine aggregate, water and from 5-15% of a precipitate comprising CaO-MgO.
Composite tubing DeLorean, J.Z. and Dirks, C.L. (John Z. DeLorean Corporation) US Pat 4 026 747(31 May 1977) An open-cell resilient foam strip, impregnated with a thermosetting resin is wrapped around a tubular core. A layer of reinforcing elements is then wrapped around the foam material in such a way that the resin is compressed into the foam cells and also encapsulates the reinforcing elements. The article is then heated to harden the resin.
Use of ground limestone as a filler in paper Bauman, H.D. (P.H. Glatfelter Co)
US Pat 4 026 762(31 May 1977)
Composite compositions from graft polymerized rigid fillers Bagley, E.B., et al (The United States of America - Secretary of Agriculture) US Pat 4 026 849 f31 May 1977) A method of preparing a filled plastics article by extruding a plastics composite The composite consists of a polymer matrix formed by grafting a thermoplastic polymer onto a rigid f'dler.
COMPOSITES. JULY 1978